Threading tap holding chuck



FIG. 1 is a side elevational view of a threading tap holding chuck showing my new design, the opposite side being a mirror image;

FIG. 2 is a side elevational view thereof as seen from the right of FIG. 1, the opposite side being a mirror image;

FIG. 3 is a perspective view thereof as seen from the bottom of FIG. 1;

FIG. 4 is a perspective view as seen from the top of FIG. 1.

The T-bar, socket wrench, and tap shown in dotted lines in FIGS. 1 and 2 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a threading tap holding chuck, substantially as shown and described. 